September weather forecastSiriri, Brazil
September
Weather in September
The first month of the spring, September, is also a moderately hot month in Siriri, Brazil, with an average temperature varying between 27.7°C (81.9°F) and 21.6°C (70.9°F).Temperature
The start of September sees the average high-temperature at a still warm 27.7°C (81.9°F), showing little difference from August's 26.7°C (80.1°F). Throughout September, the average low-temperature records at an agreeable 21.6°C (70.9°F).Heat index
The heat index value for September is appraised at a tropical 31°C (87.8°F). If one sustains activity during exposure, it could lead to a sense of fatigue, with a chance of heat cramps.The heat index's values are generally associated with conditions in shade and light breezes. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
Humidity
In Siriri, the average relative humidity in September is 78%.Rainfall
In September, the rain falls for 17.8 days. Throughout September, 34mm (1.34") of precipitation is accumulated. In Siriri, during the entire year, the rain falls for 211.1 days and collects up to 584mm (22.99") of precipitation.Daylight
In September, the average length of the day is 12h and 3min.On the first day of the month, sunrise is at 05:30 and sunset at 17:25. On the last day of September, in Siriri, sunrise is at 05:12 and sunset at 17:24 -03.
Sunshine
In September, the average sunshine in Siriri is 7.9h.UV index
May through September, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The daily high UV index of 6 in September translates into this advice:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Siriri, Brazil
- Average high temperature in September: 27.7°C
The warmest month (with the highest average high temperature) is March (31.6°C).
The months with the lowest average high temperature are July and August (26.7°C).
- Average low temperature in September: 21.6°C
The month with the highest average low temperature is March (24.7°C).
The coldest month (with the lowest average low temperature) is August (21.3°C).
Average pressure in September
Siriri, Brazil
- Average pressure in September: 1016.4mbar
The month with the highest atmospheric pressure is August (1017.4mbar).
The month with the lowest atmospheric pressure is March (1011.9mbar).
Average wind speed in September
Siriri, Brazil
- Average wind speed in September: 15.9km/h
The windiest month (with the highest average wind speed) is November (16.8km/h).
The calmest month (with the lowest average wind speed) is May (12.2km/h).
Average humidity in September
Siriri, Brazil
- Average humidity in September: 78%
The months with the highest relative humidity are June and July (81%).
The months with the lowest relative humidity are January, February, March and December (73%).
Average rainfall in September
Siriri, Brazil
- Average rainfall in September: 34mm
The wettest month (with the highest rainfall) is July (89mm).
The driest month (with the least rainfall) is November (16mm).
Average rainfall days in September
Siriri, Brazil
- Average rainfall days in September: 17.8 days
The month with the highest number of rainy days is July (23.9 days).
The month with the least rainy days is November (11 days).
Average daylight in September /
Average sunshine in September
Siriri, Brazil
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 12h and 42min).
The month with the shortest days is June (Average daylight: 11h and 30min).
- Average sunshine in September: 7h and 54min
The months with the most sunshine are March and December (Average sunshine: 8h and 18min).
The months with the least sunshine are May, July and October (Average sunshine: 7h and 24min).
Average sunshine days in September
Siriri, Brazil
- Average sunshine days in September: 7.5 days
The month with the most sunshine days is December (14.3 days).
The month with the least sunshine days is July (4.2 days).
Average UV index in September
Siriri, Brazil
- Average UV index in September: 6
The months with the highest UV index are January, February, March, April, October, November and December (UV index 7).
The months with the lowest UV index are May, June, July, August and September (UV index 6).
Average cloud cover in September
Siriri, Brazil
- Average cloud cover in September: 41
The month with the most cloud cover is July (Cloud cover 47).
The month with the least cloud cover is December (Cloud cover 35).
Average visibility in September
Siriri, Brazil
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
